CN111645659A - Electric parking method and electronic parking device for commercial vehicle - Google Patents
Electric parking method and electronic parking device for commercial vehicle Download PDFInfo
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- CN111645659A CN111645659A CN202010582107.7A CN202010582107A CN111645659A CN 111645659 A CN111645659 A CN 111645659A CN 202010582107 A CN202010582107 A CN 202010582107A CN 111645659 A CN111645659 A CN 111645659A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/08—Brake-action initiating means for personal initiation hand actuated
- B60T7/10—Disposition of hand control
- B60T7/107—Disposition of hand control with electrical power assistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The invention provides an electric parking method for a commercial vehicle, which comprises the following steps: a step S1 of configuring a rotatable parking switch member and configuring a magnetic member connected to the parking switch member; step S2 of configuring a Hall chip and detecting the change of the magnetic flux between the Hall chip and the magnetic component in the moving process of the magnetic component; step S3 of configuring two sets of voltage signals, outputting fixed voltage, and the hall chip determining the voltage signal change according to the magnetic flux change and finally determining the magnitude of the braking force. The characteristic that the change of a magnetic field around the Hall chip can be detected in a conductive state is utilized, the mode of controlling the parking braking force of the vehicle is improved to be that the magnet rotates at the position of the Hall chip to change the magnetic flux at the position of the Hall chip, so that the output voltage value of the Hall chip is changed, and finally the parking braking force is changed, therefore, the linear influence relation among the rotating angle of the magnet, the voltage and the braking force is established, and the redundancy degree of the equipment is obviously reduced.
Description
Technical Field
The invention belongs to the technical field of vehicle electronic parking braking, and particularly relates to an electric parking method and an electronic parking device for a commercial vehicle.
Background
The electronic parking brake technology on the passenger car is relatively mature, the electronic control mode is used for realizing the parking brake of the car, the traditional mode of parking and braking is realized by replacing a mechanical hand brake, and the car brake is more accurate and stable. However, the electronic parking of a passenger vehicle cannot be directly applied to the technical field of commercial vehicles, and the parking process of the commercial vehicle usually requires that the magnitude of the braking force generated by the current vehicle can be controlled, that is, a linear relationship should be formed between the opening degree of a parking switch and the braking torque, so that when emergency braking is required in the driving process of the vehicle or a brake pedal (brake) fails, the magnitude of the braking force, that is, inching, needs to be controlled, so that the braking process is more stable and safer.
However, in the electronic parking system for passenger vehicles, the parking signal is a switching value, that is, when emergency braking is required, the switch is turned on to trigger a braking signal, and the system immediately generates the maximum braking force to perform parking braking. Moreover, abrasion of parts in the parking brake system is correspondingly intensified according to the maximum braking force during parking, and the service life and the use safety of the parking system and the whole vehicle are inevitably influenced.
For the above reasons, it is difficult to directly transfer the electronic parking system on the passenger car to the commercial vehicle to meet the parking requirement in the prior art. To solve this problem, a general idea is to control the magnitude of the parking brake force by modifying the conventional parking switch in such a manner that the switch opening degree is a controlled variable by turning on the light amount trigger signal, and forming a linear relationship between the switch opening degree and the magnitude of the brake force. For example,in the invention patent application with application publication number CN110027528A, a braking force control device of a parking brake system is disclosed, which constructs a braking force time function F (x) of compressed air pressure and time of a spring brake chamber, wherein the function comprises a braking force time function F in a vehicle static state1(x) And a braking force time function F in a vehicle running state2(x) In the system, the magnitude of the braking force generated when the vehicle parks is related to the uninterrupted time of the output signal of the input device and the current parking braking force, namely the acting force of the spring pushing the output rod is changed by controlling the pressure of compressed air, so that the magnitude of the parking braking force of the vehicle is controlled. Although the technical effect that the braking force is linearly influenced by the switching value of the electronic parking switch of the commercial vehicle is achieved, the technical problems of complicated structure and high implementation difficulty exist, and particularly, the control precision of the compressed air pressure value directly influences the magnitude of the generated braking force in the technical scheme, so that if the current air pressure of the compressed air is accurately controlled to enable the air pressure value to accurately correspond to the magnitude of the braking force, the new problem is created.
On the other hand, another function of parking system except that the electron is parked outside is automatic parking, realizes the automatic parking of vehicle under the state of approaching to stop promptly, and need not to keep trampling the brake under the state of approaching to stop, among the prior art, automatic parking and two sets of system alternate segregation of electron parking on the commercial car, and the pencil is integrated complicated, is unfavorable for controlling the part in the driver's cabin and saves the volume, controls and is also very inconvenient.
In view of the above, the prior art should be improved to solve the technical problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the electric parking method of the commercial vehicle, which has a simplified structure and is easy to realize, solves the problems of complicated structure and high realization difficulty of the electric parking air pressure realization method of the commercial vehicle in the prior art, and carries out stepping control on the braking force on the basis of establishing a linear relation between the parking switch angle and the parking braking force, and the electric parking device of the commercial vehicle based on the method.
In order to solve the technical problem, the invention provides an electric parking method for a commercial vehicle, which is characterized by comprising the following steps: a step S1 of configuring a rotatable parking switch member and configuring a magnetic member connected to the parking switch member; step S2 of configuring a Hall chip and detecting the change of the magnetic flux between the Hall chip and the magnetic component in the moving process of the magnetic component; and a step S3 of configuring two sets of voltage signals which rise or fall simultaneously, outputting fixed voltage, and determining the voltage signal change according to the magnetic flux change by the Hall chip, and finally determining the braking force.
Preferably, in the step S1, the step of configuring the magnetic member includes: a step S11 of configuring the magnetic component to be perpendicular to the plane of the hall chip in a non-braking state; step S12 of configuring n gears, wherein after each gear rotates with the parking switch piece, n rotation angles formed between the magnetic component and the plane where the Hall chip is located correspond to each other; step S13, configuring corresponding said gear positions for a plurality of voltage signal values.
Further preferably, in the steps S12 and S13, the rotation angle is configured to increase with an increase in the voltage signal value or decrease with an increase in the voltage signal value.
Still further preferably, the step of determining the angle of rotation comprises: a step S121 of configuring a rotating coordinate system constructed by the Hall chip and the magnetic component; a step S122 of detecting the movement of the magnetic component on a rotating coordinate system through the Hall chip and acquiring the horizontal displacement X and the vertical displacement Y of the magnetic component on a coordinate axis; and a step S123 of obtaining the rotation angle according to the horizontal displacement and the vertical displacement.
It is further preferable that the method further includes a step S4 of configuring two microswitches with opposite signals to acquire position information of the parking switch member, wherein when the parking switch member rotates to a maximum rotation angle or a minimum rotation angle, the microswitches are triggered, and at this time, if two sets of voltage signals of the hall chip simultaneously rise or fall, and a parking lock or a parking release is triggered accordingly.
Correspondingly, the invention also provides a commercial vehicle electric parking device based on the commercial vehicle electric parking method, and the electric parking device comprises the following components: the shell assembly comprises a bottom shell panel, a pressure cover plate and a shell, wherein the pressure cover plate covers the bottom shell panel, the shell is used for accommodating the bottom shell panel and the pressure cover plate, a circuit board is arranged on the bottom shell panel, and a Hall chip is integrated on the circuit board; a parking switch member rotatably provided on the platen plate; the parking switch piece is arranged at the bottom of the parking switch piece, the magnetic component extends to the Hall chip, the magnetic component is arranged to be perpendicular to the plane of the Hall chip under a normal state, and in a use state, the parking switch piece is rotated to change an included angle formed between the magnetic component and the plane of the Hall chip so as to change the output voltage of the circuit board.
Preferably, the top of the parking switch member is arc-shaped, the bottom of the arc-shaped top surface of the parking switch member is a hollow connecting part surrounded by two side plates and a baffle plate, wherein the two side plates are arc-shaped, an arc-shaped opening is formed at the bottom of the parking switch member, a hole column is formed in a hollow inner cavity of the parking switch member, and the magnetic part is arranged in the hole column.
Preferably, the cover pressing plate is provided with two symmetrically arranged spring connecting columns, the cylindrical surface of each spring connecting column is provided with an opening, a connecting plate is formed on the wall of the column far away from the other spring connecting column on each spring connecting column, the surface of each connecting plate protrudes towards one side far away from the spring connecting column, and the protrusion is defined as a side plate connecting column, wherein the surfaces of the two side plates on the parking switch part are respectively provided with a connecting hole with the same size as the side plate connecting column, and when the parking switch part is rotatably connected with the cover pressing plate, the side plates on the parking switch part are sleeved on the side plate connecting columns and are tightly attached to the connecting plates; the two spring parts are respectively arranged in the opening of the spring connecting column, and when the parking switch part is rotatably connected with the gland plate, the top of the spring part is abutted against the cavity surface of the hollow cavity of the parking switch part.
Still further preferably, an insertion part is formed at one end of the gland plate, which is close to the two spring connecting columns, and an inner cavity of the insertion part forms an insertion part position.
Still further preferably, the casing is a hollow casing, a first receiving cavity and a second receiving cavity are formed in the casing, the first receiving cavity and the second receiving cavity are separated from each other, and when the casing receives the bottom casing panel and the press cover plate, the parking switch member on the press cover plate is located in the first receiving cavity; the second accommodating cavity is in butt joint with the inserting part on the press cover plate and sleeved outside the inserting part, and an automatic parking switch piece is inserted in the inserting position of the inserting part.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial technical effects:
1. the characteristic that the change of a surrounding magnetic field of a Hall chip can be detected in a conductive state is utilized, the acting force of a spring pushing an output rod is changed by controlling the pressure of compressed air in the prior art, so that the mode of controlling the parking braking force of a vehicle is realized, the mode is improved that the magnetic flux at the Hall chip is changed by rotating the magnet at the position of the Hall chip, the output voltage value of the Hall chip is changed, and the size of the parking braking force is changed finally, so that the linear influence relation between the rotating angle of the magnet and the voltage and the size of the braking force is established, the control mode of the parking braking force in the prior art is simplified, the redundancy degree of equipment is obviously reduced, and the device is easy to popularize;
2. configuring n gears, enabling each gear to correspond to a rotation angle, wherein the rotation angle is an included angle formed between a plane where the magnetic component and the Hall chip are located, when the parking switch piece rotates to a corresponding angle, namely the parking switch piece rotates to the corresponding angle, programming each rotation angle, enabling the rotation angle to form a corresponding relation with a voltage value of the circuit, namely when the parking switch piece rotates to the corresponding angle, changing the corresponding voltage value in the circuit through the Hall chip, and then corresponding to the parking braking force; in this way, the linear relation is formed between the rotation angle of the magnetic component, the gear, the magnetic flux around the Hall chip, the output voltage value of the Hall chip and the parking braking force;
3. the determination of the rotation angle of the magnetic component is to detect the displacement of the magnetic component in the horizontal direction and the vertical direction through the Hall chip and correspondingly calculate the rotation angle according to the displacement in the horizontal direction and the vertical direction, thus converting the rotation angle into the displacement in the horizontal direction and the vertical direction, reducing the difficulty of the calculation of the rotation angle and leading the calculation result of the angle to be more visual and accurate,
4. the parking switch component is characterized in that a magnetic component such as magnetic steel is fixedly arranged in the parking switch component, the bottom of the parking switch component is connected with a pressure cover plate through a spring component, a spring between the parking switch component and the pressure cover plate is in a loose state in a normal state, and the parking switch component is rotated by lifting or pressing the parking switch component in a use state;
5. the parking switch is provided with two microswitches, when the parking switch piece rotates to the maximum rotation angle or the minimum rotation angle, the microswitches are triggered, and at the moment, the switch position, namely the switch working state, is accurately judged; compared with the prior art, the contact switch signal adopted by the microswitch is improved in vibration, contact oxidation, electrical service life, sensitivity, signal reliability and other aspects, and the position of the current parking switch piece can be accurately acquired through the microswitch, so that the problem that the braking force generated by incomplete release of a hand brake affects the running and the vehicle is solved;
6. when the parking switch piece rotates to the maximum rotation angle, the parking lock is triggered, when the parking switch piece rotates to the minimum rotation angle, the parking release is triggered, and the switches are subjected to redundancy correction when the micro switches are configured, so that when the parking switch piece rotates to the maximum rotation angle and triggers the micro switches, the two micro switches change simultaneously and signals are opposite, and the signal short circuit caused by signal interference can be detected; for example, when the parking switch piece rotates to the maximum rotation angle, two voltage signals of the hall chip rise simultaneously, the parking switch piece is in contact with the micro switch to trigger the micro switch, and when the system detects that two groups of voltage signals of the hall chip rise simultaneously and the micro switch is triggered, the parking lock is triggered; when the parking switch piece rotates to the minimum rotation angle, two voltage signals of the Hall chip are simultaneously reduced, the parking switch piece is in contact with another microswitch at the moment to trigger the microswitch, the system detects that two groups of voltage signals of the Hall chip are simultaneously reduced, and the microswitch triggers the parking release. Correspondingly, when the system does not detect a voltage signal rising or falling simultaneously or does not detect a microswitch triggering signal, the system reports the fault of the switch signal simultaneously.
7. The parking switch part and the automatic parking switch are integrated, so that electronic parking and automatic parking are simultaneously realized through one device, the structure of the parking switch is simplified, the device space of a central control position of a cab is liberated, and the automatic parking switch is spliced with the gland plate, so that the installation process of the installation device is simplified;
8. the power supply circuit inputs the working voltage required by the Hall chip, and is configured with double-circuit voltage signal detection, so that the false triggering caused by the clamping stagnation and the circuit short circuit of the parking switch piece is effectively avoided.
Drawings
Fig. 1 is an exploded view illustrating an exploded structure of an electric parking device for a commercial vehicle according to a preferred embodiment of the present invention;
fig. 2 is a schematic view illustrating a structure of the bottom case panel of fig. 1;
FIG. 3 is a schematic diagram illustrating the structure of the circuit board of FIG. 1;
FIG. 4 is a circuit diagram showing an equivalent circuit structure of a switch circuit in a preferred embodiment of the present invention;
FIG. 5 is an exploded view showing the exploded structure of the gland plate of FIG. 1;
FIG. 6 is a schematic view illustrating the structure of the first light guide pillar according to the preferred embodiment of the present invention;
FIG. 7 is an exploded view illustrating an exploded structure of the parking switch member of FIG. 1;
FIG. 8 is a schematic view showing the structure of the housing shown in FIG. 1;
fig. 9 is a flowchart illustrating a flow of an electric parking method for a commercial vehicle according to a preferred embodiment of the present invention;
FIG. 10 is a flowchart illustrating steps of arranging a magnetic member in the electric parking method for a commercial vehicle shown in FIG. 9;
FIG. 11 is a state diagram showing a state where the parking switch member is assembled with the circuit board and in a zero shift position;
fig. 12 is a state diagram showing a state where the parking switch member is assembled with the circuit board and in first gear;
fig. 13 is a state diagram showing a state where the parking switch member is assembled with the circuit board and in the second gear;
FIG. 14 is a schematic view showing a linear relationship between a rotation angle of a parking switch member and a voltage in a preferred embodiment of the present invention
Detailed Description
Embodiments of an electric parking method and an electric parking device for a commercial vehicle according to the present invention will be described with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
It should be noted that, in the embodiments of the present invention, the expressions "first" and "second" are used to distinguish two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and the descriptions thereof in the following embodiments are omitted.
In the electric parking method for the commercial vehicle and the parking device based on the method in the preferred embodiment of the invention, the parking switch piece is rotated (turned over) to enable the magnetic component at the bottom of the parking switch piece to generate displacement, so that the included angle between the magnetic component and the Hall chip is changed, the Hall chip detects the change generated by the magnetic flux around the Hall chip, so that the output voltage value of the Hall chip is changed, and finally the parking braking force is linearly changed. It should be noted that in more preferred embodiments, other ways of changing the magnetic flux should also be included, but all should fall within the concept of changing the output voltage by a change in magnetic flux of the present invention.
Fig. 1 is an exploded view illustrating an exploded structure of an electric parking device for a commercial vehicle according to a preferred embodiment of the present invention. The electric parking device for a commercial vehicle in the preferred embodiment includes a housing assembly, a circuit board 50 disposed in the housing assembly, a rotatable parking switch member 40, and an automatic parking switch member 60. Referring to fig. 1, the housing assembly is formed by bonding and splicing three parts of a bottom case panel 10, a press cover plate 20 and a housing 30, a parking switch member 40 is rotatably spliced with the housing assembly, and an automatic parking switch member 60 is spliced with the housing 30.
Fig. 2 is a schematic view illustrating a structure of the bottom chassis panel in fig. 1. The bottom shell panel 10 is in the shape of a long straight plate, and serves as a substrate base of the housing assembly for carrying the circuit board. Outer convex clamping blocks 11 are formed on the periphery of the shell of the bottom shell panel 10, when the bottom shell panel 10 is spliced with the press cover plate 20, the clamping blocks 11 are used for being mutually clamped with clamping openings formed in the shell of the press cover plate 20 to form a clamping structure, and the description of the press cover plate part is continued below.
Fig. 3 is a schematic diagram showing the structure of the circuit board of fig. 1. Referring to fig. 3, a hall chip 51 is integrated on a circuit board 50, and a groove 52 extending along a length direction of the circuit board 50 is formed on the circuit board 50 at a position close to the hall chip 51, and when assembling, a magnetic member of the parking switch member extends into the groove 52, and then, the magnetic member is displaced, and a magnetic field around the hall chip 51 is cut to change a magnetic flux. In addition, two microswitches 53 are preset on the circuit board 50, the microswitches 53 are triggered when the contacts 531 thereof are contacted, so that during assembly, the parking switch member 40 is lifted or pressed down to form a maximum or minimum rotation angle, at this time, the parking switch member 40 may be rotated until the outer extension thereof contacts with the contacts 531 of the microswitches 53 to trigger the microswitches 53, and in another case, an inverted "U" -shaped contact member is arranged in the inner cavity of the parking switch member 40, two contact surfaces are formed under both sides of the U-shaped port of the contact member, so that the microswitches may be triggered when the parking switch member is rotated until any contact surface thereof contacts with the contacts 531 of any microswitches 53. In this way, by providing the microswitch 53, the position of the parking switch member 40 is detected, i.e. when the contact 531 of the microswitch 53 is touch-activated, the parking switch member is rotated to the maximum or minimum rotation angle. In actual conditions, when the parking switch member is rotated to the maximum or minimum rotation angle, the maximum or minimum parking braking force is represented. In addition, the two micro switches are arranged to correspond to the parking lock and the parking release, respectively, for example, in the preferred embodiment of the present invention, the micro switch 53 is triggered and the parking lock is triggered when the parking switch piece 40 is rotated to the maximum rotation angle, and correspondingly, the micro switch 53 is triggered and the parking release is triggered when the parking switch piece 40 is rotated to the minimum rotation angle. In addition, the two micro switches are subjected to redundancy correction, and the two micro switches are configured to be opposite in signal, so that signal short circuit caused by signal interference can be detected in the process of simultaneous change of signals of the two micro switches.
With continued reference to fig. 3, at a side edge of the circuit board 50, a pin assembly 54 is further included, the pin assembly 54 being plugged into a corresponding hole on the circuit board 50. in the preferred embodiment, the pin assembly 54 includes 12 pins, each pin corresponding to a port on the switch circuit. Fig. 4 is a circuit diagram showing an equivalent circuit structure of a switch circuit in a preferred embodiment of the present invention. Referring to fig. 4, the interfaces on the switch circuits corresponding to the values of the first to twelfth pins are respectively a parking brake switch interface, a parking release switch interface, a hall chip ground wire interface, a parking brake switch normal position interface, a parking release switch normal position interface, a first hall chip signal output port, a power interface, a hall chip programming power interface, a second hall chip signal output port, a parking indicator light interface, a temporary stop switch interface, and a temporary stop indicator light interface.
Before the circuit board 50 is assembled with the bottom shell panel 10, switches including two micro switches are detected through the detection table, and after the detection is normal, the bottom of the circuit board and the surface of the bottom shell panel 10 are adhered into a whole by using silicon rubber as an adhesive, and transparent organic silicon is filled in the circuit board and the bottom of the circuit board for sealing. Then, the button contact rubber 70 is adhered to the surface of the circuit board 50 by using the silicone rubber as an adhesive, and finally, the molding is performed.
After the circuit board is bonded to the bottom chassis panel 10, the press cover plate is assembled. The press-cover plate 20 is provided to cover the bottom chassis panel 10 and the circuit board 50. Fig. 5 is an exploded view showing an exploded structure of the gland plate of fig. 1. As shown in fig. 5, a bayonet 21 is formed on the peripheral surface of the press-cover plate 20, and as described above, referring to fig. 2 and 5, the bayonet 21 is engaged with the protruding latch 11 formed on the periphery of the bottom shell panel 10 when the press-cover plate 20 is spliced with the bottom shell panel 10, so that the press-cover plate 20 is tightly butted against the bottom shell panel 10. The press cover plate 20 has a pin receiving portion 22 formed at one side thereof, and referring to fig. 1, 3 and 5, after the circuit board 50 is adhered to the bottom chassis panel 10, the circuit board is spliced to the bottom chassis panel 10, and the pin assemblies 54 on one side of the circuit board 50 are received in the pin receiving portion 22 of the press cover plate 20. The cover plate 20 has an insertion portion 23 formed on the other side of the pin receiving portion 22, and an insertion position (not shown) is formed in an inner cavity of the insertion portion 23, and referring back to fig. 1 and 5, the insertion portion 23 is used for being inserted into the automatic parking switch 60.
With continued reference to fig. 5, two stacked spring connecting posts 24 are formed at the middle section of the cover pressing plate 20, an opening 241 is formed at the top end of the cylindrical surface of the spring connecting post 24, the spring element 25 extends into the bottom of the spring connecting post 24 from the opening position, so as to be fixed with the cover pressing plate 20, and when the cover pressing plate 20 is assembled with the parking switch element 40, the top of the spring element 25 is abutted against the inner cavity surface of the parking switch element 40. In the preferred embodiment, a spring return cap 26 made of copper pipe may be further provided at the top end of each spring member 25, so as to prevent the end of the spring member 25 from directly contacting the inner cavity surface of the parking switch member 40, thereby prolonging the service life of the spring member 25. On each spring connecting column 24, a connecting plate 27 is formed on the column wall surface far away from the other spring connecting column 24, namely, the column wall surface facing the outside of the gland plate 20, the connecting plate 27 is attached to the spring connecting columns 24, and the surfaces of the connecting plates 27 respectively extend and protrude towards one side far away from the pulley connecting column, so as to form a side plate connecting column 271, the side plate connecting column 271 is used for being butted with a parking switch 40, and the parking switch part is further described below. It should be noted that, a light guide bar mounting groove 28 is disposed on the cover plate 20 between the pin receiving portion 22 and the spring connecting post 24 in the length extending direction thereof, and fig. 6 is a schematic view showing the structure of the first light guide bar in the preferred embodiment of the present invention. Referring to fig. 6, the first light guiding pillar 29 is flat, and the end surfaces of the two ends of the first light guiding pillar form a curved surface, and the width of the first light guiding pillar decreases from the bottom to the top. Use the direction shown in fig. 6 as the reference, then the bottom of the upper surface of first light guide 29, and the top of lower surface all are connected with lamp pole fixture block 291 respectively, look back fig. 5, be formed with in the light guide mounting groove 28 with lamp pole fixture block 291 assorted lamp pole draw-in groove, like this, realize the adaptation of first light guide 29 and light guide mounting groove 28 through fixture block and draw-in groove joint.
After the cover plate 20 is abutted against the bottom case panel 10 and the circuit board 50, the parking switch member is mounted. Fig. 7 is an exploded view illustrating an exploded structure of the parking switch member of fig. 1. The parking switch member 40 is rotatably connected to the cover plate 20. referring to fig. 7, the parking switch member 40 has a top portion formed in a curved surface, a bottom portion formed in a hollow connecting portion surrounded by two side plates 41 and a stopper 42 connecting the two side plates 41, the side plates 41 have an arc-shaped edge, and one side of the hollow connecting portion formed by the two side plates 41 and the stopper 42 is formed in an arc-shaped opening. The surfaces of the side plates 41 are respectively formed with connecting holes 411 butted with the side plate connecting posts 271 shown in fig. 5, when the parking switch member 40 is connected with the gland plate 20, the side plate connecting posts 271 penetrate through the connecting holes 411 and the side plates 41, and then the side plates 41 are tightly attached to the connecting plate 27. The hollow cavity of the hollow connecting part forms a hole column 43 fixed with the wall surface of the cavity, silicon rubber is used as an adhesive and smeared on the surface of the magnetic steel, and the magnetic steel is used as a magnetic part 44 and inserted into the hole column 43. Referring to fig. 3 and 7, when the parking switch member 40 is connected to the gland plate 20, the magnetic member 44 extends toward the hall chip 51 and extends into the groove 52 on one side of the hall chip 51, and in a normal state, the axis of the magnetic member 44 is kept perpendicular to the plane of the hall chip 51. Similar to the first light guide pillar 29 on the gland plate 20, the parking switch 40 may also be similarly provided with a second light guide pillar 45, and the second light guide pillar 45 forms a bottom insertion structure in a shape like a Chinese character 'tu', and is in butt joint with an insertion position (not shown) in the hollow connecting portion of the parking switch 40. In addition, in order to improve the tactile feeling of the parking switch member 40 in the actual use condition, a tactile decorative strip 46 is press-fitted on the arc-shaped top surface thereof.
Referring back to fig. 5 and 7, when the parking switch member 40 is connected to the gland plate 20, the tops of the two spring members 25 abut against the hollow cavity surface of the parking switch member 40, so that the parking switch member is rotated or flipped, that is, the parking switch member 40 is lifted or pressed down to elastically deform the two spring members 25, in the process, the magnetic member 44 at the bottom thereof also rotates along with the movement of the parking switch member 40, and since the magnetic member 44 is perpendicular to the plane of the hall chip 51, that is, perpendicular to the bottom surface of the recess 52, and an included angle is formed between the magnetic member 44 and the plane of the hall chip 51 after the rotation, in the energized state, the magnetic flux on the hall chip 51 changes, and the hall chip 51 detects the change of the magnetic flux and accordingly changes the output voltage value thereof.
And finally, assembling the shell. Fig. 8 is a schematic view showing the structure of the housing shown in fig. 1. Referring to fig. 8, the housing 30 is a hollow shell, and a first receiving cavity 31 and a second receiving cavity 32 are formed on the housing 30, when the housing 30 is assembled, the parking switch member 40 is located in the first receiving cavity 31, the second receiving cavity 32 is abutted with the insertion part 23 of the gland plate 20 and is sleeved with the insertion part 23, and the automatic parking switch member 60 is inserted into the insertion part 23 from the second receiving cavity 32.
Based on the commercial trailer electric parking device, the invention also provides a commercial vehicle electric parking method in a preferred embodiment. Fig. 9 is a flowchart illustrating a flow of an electric parking method for a commercial vehicle according to a preferred embodiment of the present invention. As shown in fig. 9, in the preferred embodiment of the present invention, the electric parking method for a commercial vehicle includes the following steps: a step S1 of configuring a rotatable parking switch member and configuring a magnetic member connected to the parking switch member; step S2 of configuring a Hall chip and detecting the change of the magnetic flux between the Hall chip and the magnetic component in the moving process of the magnetic component; and a step S3 of configuring two sets of voltage signals which rise or fall simultaneously, outputting fixed voltage, and determining the voltage signal change according to the magnetic flux change by the Hall chip, and finally determining the braking force.
Fig. 10 is a flowchart illustrating steps of arranging a magnetic member in the electric parking method for a commercial vehicle shown in fig. 1. Referring to the electric parking device, the magnetic component is configured to be perpendicular to the plane where the hall chip is located and the groove surface of the groove on one side of the hall chip in a normal state, that is, in a non-braking state. For example, in the preferred embodiment of the present invention, 3 shift positions are configured, which are respectively a zero shift position, a first shift position and a second shift position, and each shift position is programmed respectively. Fig. 11 to 13 respectively show the assembly states of three gears in the preferred embodiment, the zero gear is a normal gear, that is, the included angle between the magnetic component 44 and the hall chip 51 is 90 degrees, the included angle between the first gear, that is, the magnetic component 44 and the hall chip 51 is 30 degrees, and the included angle between the second gear, that is, the magnetic component 44 and the hall chip 51 is 10 degrees.
The process that the Hall chip changes the output voltage is based on the Hall effect, and the detection of the Hall chip is carried out according to the change of the magnetic flux of the magnetic component caused by the displacement of the magnetic component. Fig. 14 is a schematic view illustrating a linear relationship between a rotation angle of a parking switch member and a voltage in a preferred embodiment of the present invention. In the preferred embodiment, the power module converts the external circuit voltage (16V-32V) to the required operating voltage (5V) for the hall chip and, as shown, provides two voltage signals. Referring to fig. 4 and 14, the hall chip employs two voltage outputs, namely a first hall chip signal output 81 and a second hall chip signal output 82, and the first and second hall chip signal outputs are two voltage signals that are simultaneously raised or lowered, as shown in fig. 14, for the first hall chip signal output 81, in a normal state, that is, a zero-shift state, a voltage output of 0.5V is maintained, when the first shift is performed, a voltage output of 4.5V is maintained, and when the second shift is performed, a voltage output of 0V is maintained; for the second hall chip signal output 82, in the zero gear state, the 0.25V voltage output is maintained, when the first gear is performed, the 2.25V voltage output is maintained, and when the second gear is performed, the 0V voltage output is maintained.
In different embodiments of the invention, more gears can be configured for the rotation angle, and different parking braking forces can be corresponded, only the linear relationship of increasing or decreasing between the rotation angle and the output voltage of the hall chip needs to be maintained.
The rotation angle determining process is to configure a rotation coordinate system formed by the Hall chip and the magnetic component, and the X axis and the Y axis respectively represent the displacement amount of the magnetic component in the horizontal direction and the vertical direction, so that the included angle between the magnetic component and the plane where the Hall chip is located, namely the rotation angle, is calculated according to the displacement of the magnetic component in the horizontal direction and the vertical direction.
Referring back to fig. 12, when the parking switch member 40 is in the zero position, it is not in contact with any of the micro switches 53, and the micro switch 53 is not triggered; referring back to fig. 11, when the parking switch member 40 is lifted up to the first gear, the maximum rotation angle is reached, and according to the presenting direction of fig. 11, the parking switch member 40 contacts with the contact point of the microswitch 53 positioned forward and triggers the microswitch 53 positioned forward; accordingly, referring back to fig. 13, when the parking switch member 40 is depressed to the second gear, the minimum rotation angle is reached, and according to the presenting direction of fig. 13, the parking switch member 40 contacts the contact point of the rear set micro switch 53 and triggers the rear set micro switch 53. Thus, when the two microswitches 53 are alternatively activated, the current position of the parking switch member 40 can be respectively represented.
In order to ensure the normal operation of the signals, in the preferred embodiment, as mentioned above, when the parking switch member rotates to the maximum rotation angle and triggers the micro switches, the two micro switches change simultaneously and the signals are opposite, so that the signal short circuit caused by signal interference can be detected; specifically, for example, when the parking switch piece rotates to the maximum rotation angle, two voltage signals of the hall chip rise simultaneously, and the parking switch piece contacts with the micro switch to trigger the micro switch, and when the system detects that two groups of voltage signals of the hall chip rise simultaneously and the micro switch is triggered, the parking lock is triggered; when the parking switch piece rotates to the minimum rotation angle, two voltage signals of the Hall chip are simultaneously reduced, the parking switch piece is in contact with another microswitch at the moment to trigger the microswitch, the system detects that two groups of voltage signals of the Hall chip are simultaneously reduced, and the microswitch triggers the parking release. Correspondingly, when the system does not detect a voltage signal rising or falling simultaneously or does not detect a microswitch triggering signal, the system reports the fault of the switch signal simultaneously.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial technical effects:
1. the characteristic that the change of a surrounding magnetic field of a Hall chip can be detected in a conductive state is utilized, the acting force of a spring pushing an output rod is changed by controlling the pressure of compressed air in the prior art, so that the mode of controlling the parking braking force of a vehicle is realized, the mode is improved that the magnetic flux at the Hall chip is changed by rotating the magnet at the position of the Hall chip, the output voltage value of the Hall chip is changed, and the size of the parking braking force is changed finally, so that the linear influence relation between the rotating angle of the magnet and the voltage and the size of the braking force is established, the control mode of the parking braking force in the prior art is simplified, the redundancy degree of equipment is obviously reduced, and the device is easy to popularize;
2. configuring n gears, enabling each gear to correspond to a rotation angle, wherein the rotation angle is an included angle formed between a plane where the magnetic component and the Hall chip are located, when the parking switch piece rotates to a corresponding angle, namely the parking switch piece rotates to the corresponding angle, programming each rotation angle, enabling the rotation angle to form a corresponding relation with a voltage value of the circuit, namely when the parking switch piece rotates to the corresponding angle, changing the corresponding voltage value in the circuit through the Hall chip, and then corresponding to the parking braking force; in this way, the linear relation is formed between the rotation angle of the magnetic component, the gear, the magnetic flux around the Hall chip, the output voltage value of the Hall chip and the parking braking force;
3. the determination of the rotation angle of the magnetic component is to detect the displacement of the magnetic component in the horizontal direction and the vertical direction through the Hall chip and correspondingly calculate the rotation angle according to the displacement in the horizontal direction and the vertical direction, thus converting the rotation angle into the displacement in the horizontal direction and the vertical direction, reducing the difficulty of the calculation of the rotation angle and leading the calculation result of the angle to be more visual and accurate,
4. the parking switch component is characterized in that a magnetic component such as magnetic steel is fixedly arranged in the parking switch component, the bottom of the parking switch component is connected with a pressure cover plate through a spring component, a spring between the parking switch component and the pressure cover plate is in a loose state in a normal state, and the parking switch component is rotated by lifting or pressing the parking switch component in a use state;
5. the parking switch is provided with two microswitches, when the parking switch piece rotates to the maximum rotation angle or the minimum rotation angle, the microswitches are triggered, and at the moment, the switch position, namely the switch working state, is accurately judged; compared with the prior art, the contact switch signal adopted by the microswitch is improved in vibration, contact oxidation, electrical service life, sensitivity, signal reliability and other aspects, and the position of the current parking switch piece can be accurately acquired through the microswitch, so that the problem that the braking force generated by incomplete release of a hand brake affects the running and the vehicle is solved;
6. when the parking switch piece rotates to the maximum rotation angle, the parking lock is triggered, when the parking switch piece rotates to the minimum rotation angle, the parking release is triggered, and the switches are subjected to redundancy correction when the micro switches are configured, so that when the parking switch piece rotates to the maximum rotation angle and triggers the micro switches, the two micro switches change simultaneously and signals are opposite, and the signal short circuit caused by signal interference can be detected; for example, when the parking switch piece rotates to the maximum rotation angle, two voltage signals of the hall chip rise simultaneously, the parking switch piece is in contact with the micro switch to trigger the micro switch, and when the system detects that two groups of voltage signals of the hall chip rise simultaneously and the micro switch is triggered, the parking lock is triggered; when the parking switch piece rotates to the minimum rotation angle, two voltage signals of the Hall chip are simultaneously reduced, the parking switch piece is in contact with another microswitch at the moment to trigger the microswitch, the system detects that two groups of voltage signals of the Hall chip are simultaneously reduced, and the microswitch triggers the parking release. Correspondingly, when the system does not detect a voltage signal rising or falling simultaneously or does not detect a microswitch triggering signal, the system reports the fault of the switch signal simultaneously.
7. The parking switch part and the automatic parking switch are integrated, so that electronic parking and automatic parking are simultaneously realized through one device, the structure of the parking switch is simplified, the device space of a central control position of a cab is liberated, and the automatic parking switch is spliced with the gland plate, so that the installation process of the installation device is simplified;
8. the power supply circuit inputs the working voltage required by the Hall chip, and is configured with double-circuit voltage signal detection, so that the false triggering caused by the clamping stagnation and the circuit short circuit of the parking switch piece is effectively avoided.
The present invention has been described in detail, and the embodiments are only used for understanding the method and the core idea of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and to implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. An electric parking method for a commercial vehicle is characterized by comprising the following steps:
a step S1 of configuring a rotatable parking switch member and configuring a magnetic member connected to the parking switch member;
step S2 of configuring a Hall chip and detecting the change of the magnetic flux between the Hall chip and the magnetic component in the moving process of the magnetic component;
and a step S3 of configuring two sets of voltage signals which rise or fall simultaneously, outputting fixed voltage, and determining the voltage signal change according to the magnetic flux change by the Hall chip, and finally determining the braking force.
2. The electric parking method for commercial vehicle according to claim 1, wherein the step of disposing a magnetic member in step S1 includes:
a step S11 of configuring the magnetic component to be perpendicular to the plane of the hall chip in a non-braking state;
step S12 of configuring n gears, wherein after each gear rotates with the parking switch piece, n rotation angles formed between the magnetic component and the plane where the Hall chip is located correspond to each other;
step S13, configuring corresponding said gear positions for a plurality of voltage signal values.
3. The electric parking method of a commercial vehicle according to claim 2, wherein in the steps S12 and S13, the rotation angle is configured to be increased as the voltage signal value increases or to be decreased as the voltage signal value increases.
4. The electric parking method for commercial vehicles according to claim 3, wherein the step of determining the rotation angle comprises:
a step S121 of configuring a rotating coordinate system constructed by the Hall chip and the magnetic component;
a step S122 of detecting the movement of the magnetic component on a rotating coordinate system through the Hall chip and acquiring the horizontal displacement X and the vertical displacement Y of the magnetic component on a coordinate axis;
and a step S123 of obtaining the rotation angle according to the horizontal displacement and the vertical displacement.
5. The electric parking method for commercial vehicle according to claim 1, further comprising a step S4 of configuring two micro switches with opposite signals to obtain the position information of the parking switch member, wherein,
when the parking switch piece rotates to the maximum rotation angle or the minimum rotation angle, the parking switch piece is in contact with one of the contacts of the two micro switches and triggers the micro switch corresponding to the contact, at the moment,
and if the two groups of voltage signals of the Hall chip rise or fall simultaneously, correspondingly triggering parking locking or parking releasing.
6. An electric parking device for a commercial vehicle according to claims 1 to 5, characterized in that the electric parking device comprises:
the shell assembly comprises a bottom shell panel, a pressure cover plate and a shell, wherein the pressure cover plate covers the bottom shell panel, the shell is used for accommodating the bottom shell panel and the pressure cover plate, a circuit board is arranged on the bottom shell panel, and a Hall chip is integrated on the circuit board;
a parking switch member rotatably provided on the platen plate;
a power supply circuit which inputs the working voltage required by the Hall chip, wherein,
the parking switch piece is provided with a magnetic component at the bottom, the magnetic component extends to the Hall chip, the magnetic component is arranged to be perpendicular to the plane of the Hall chip under a normal state, and in a use state, the parking switch piece is rotated to change an included angle formed between the magnetic component and the plane of the Hall chip so as to change the output voltage of the Hall chip.
7. The electric parking device for commercial vehicle according to claim 6, wherein the parking switch member is arc-shaped at the top, and the bottom of the arc-shaped top is a hollow connection part surrounded by two side plates and a baffle plate, wherein,
the edges of the two side plates are arc-shaped, an arc-shaped opening is formed at the bottom of the parking switch piece, a hole column is formed in a hollow inner cavity of the parking switch piece, and the magnetic part is arranged in the hole column.
8. The electric parking device for commercial vehicle according to claim 7, wherein the gland plate is formed with two symmetrically arranged spring connecting columns, the cylindrical surfaces of the spring connecting columns are formed with openings, each spring connecting column is formed with a connecting plate on the column wall far away from the other spring connecting column, the surface of the connecting plate is convex towards the side far away from the spring connecting column, the convex is defined as a side plate connecting column, wherein,
connecting holes with the same size as the side plate connecting columns are formed in the surfaces of the two side plates of the parking switch piece respectively, and when the parking switch piece is rotatably connected with the press cover plate, the side plates on the parking switch piece are sleeved on the side plate connecting columns and are tightly attached to the connecting plates;
the two spring parts are respectively arranged in the opening of the spring connecting column, and when the parking switch part is rotatably connected with the gland plate, the top of the spring part is abutted against the cavity surface of the hollow cavity of the parking switch part.
9. The parking device for the commercial vehicle and the electric vehicle as claimed in claim 8, wherein an insertion part is formed on the gland plate at one end close to the two spring connecting columns, and an inner cavity of the insertion part forms an insertion position.
10. The parking device for commercial electric vehicles according to claim 9, wherein the housing is a hollow shell, and a first receiving cavity and a second receiving cavity are formed in the housing at intervals, wherein,
when the shell receives the bottom shell panel and the press cover plate, a parking switch piece on the press cover plate is positioned in the first receiving cavity; the second accommodating cavity is in butt joint with the inserting part on the press cover plate and sleeved outside the inserting part, and an automatic parking switch piece is inserted in the inserting position of the inserting part.
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| CN202010582107.7A CN111645659B (en) | 2020-06-23 | 2020-06-23 | Commercial vehicle electric parking method and electronic parking device |
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| CN202010582107.7A CN111645659B (en) | 2020-06-23 | 2020-06-23 | Commercial vehicle electric parking method and electronic parking device |
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| US20180086321A1 (en) * | 2016-09-24 | 2018-03-29 | Bendix Commercial Vehicle Systems Llc | Electronic park brake interface module, park brake controller and system |
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| EP1179463A1 (en) * | 2000-07-31 | 2002-02-13 | Dura France | Control device of an electric parking brake comprising a transducer |
| EP1179462A1 (en) * | 2000-07-31 | 2002-02-13 | Dura France | Control device of a motor vehicle electric parking brake |
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Effective date of registration: 20230412 Address after: No. 456, Binhai 4th Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Applicant after: WENZHOU RUILI KORMEE AUTOMOTIVE ELECTRONICS CO.,LTD. Address before: 325299 2666 Development Zone, Ruian Economic Development Zone, Wenzhou, Zhejiang Applicant before: RUILI GROUP RUIAN AUTO PARTS Co.,Ltd. |
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